Finding the Third Proportional to 210,181.50 and 435,321

Step by Step Solution

1. Step 1: Write the proportion equation
   210,181.50 : 435,321 = 435,321 : x
2. Step 2: Convert to fraction form
   210,181.50/435,321 = 435,321/x
3. Step 3: Cross multiply
   210,181.50x = 435,321 × 435,321
4. Step 4: Simplify right side
   210,181.50x = 189,504,373,041
5. Step 5: Solve for x
   x = 189,504,373,041/210,181.50
6. Step 6: Final answer
   x = 901,622.52